Gas-engine muffler.



J. KELLINGTON.

GAS ENGINE MUPPLER. APPLICATION FILED APR. 22, 1909.

951,080. Patented Mar. 1, 1910.

WITNESSES.- INI/ENTOR www Jahn jemyzm ATTH/VEY JOI-IN KELLINGTON, NEWWESTMINSTER, BRITISH COLUMBIA, CANADA GAS-ENGINE MUFFLER.

Specification of Letters Patent.

Patenten Mar, i, icio.

Application tiled April 22, 1969. Serial No.'491,462.

To all whom it may concern:

Be it known that I, JoiiN KELLINGTON, citizen of the Dominionof Canada,residing at New llivestininster, in the Province of British Columbia,Canada, have invented a new and useful Improvement in Gas-EngineMufflers, of which the following is a specification.

This invention relates to a muffler for a high pressure steani or for aninternal combustion engine which is designed to effectually soften thenoise of the exhaust without materially lesseniiig the efficiency of theengine.

As at present designed, miitllers so seriously interfere with a gasengine eliiciency that they are seldom made use of. This reduction ofefficiency is due to the obstriicder.

tion which they cause to a free exhaust and the consequent back pressurein the cylinl overcome these objections in the invention which is thesubject of this application by delivering the exhaust into an annularspace in which annular space are projections which interfere with 'thedirect passage of the escaping gases, but the obstructions are rotatedin the direction of escape so that they do not interfere with the freeescape of the exhaust to an extent that will cause a back pressure inthe cylinder. The means by which l attain this result are full explainedin the following specification re erence being made to the drawings bywhich it is accompanied in which;

Figure 1. is a longitudinal section through the niiitller. Fig. 2. avertical cross section of the same, and Fig. 3. a developed plan of asection of the iniitliing surface. j

In these drawings 2 represents a cylinder or drunirotatable on its axiseither on the driving shaft of the engine or on atsupplemeiitary shaft 3driven therefrom. This cylinder 2 is provided on its exterior surfacewith a series of projections 4 which are preferably rectangular andplaced in rows parallet to the axis of rotation, those of each rowheilig staggered or placed opposite to the intervals of the adjacentrows. lnclosing this rotatable cylinder 2 and its projections andclosely fitting the same is a casing 5 secured tothe base or foundationplate of the engine and may appropriately carry the hearings 8 in whichthe shaft 3 of the cylindcrf.) rotates. An annular space filled withstaggered projections is thus provided into which is delivered at anangle toward the direction of rotation the exhaust 6 of the highpressure steam or gas engine which exhaust thus impinges on theprojections as the cylinder 2 rotates and tliiisprevents the miittlingobstructions from interfering with the freedom of the exhaust to anextent that will cause any considerable back pressure in the cylinder.

The exhaust delivery 7 may be taken from the periphery of the casingadjacent to the inlet so that' the exhaust travels very nearly aroundthe complete circle, or may drawn from any closing casing.

The device is particularly applicable to a rotary' engine of particulardesign which is the subject of a in which engine is a rotata may beprovided with the projections 4 and casing 5 to form a muiiler but theinvention is also applicable to any engine. l

The device is simple an inexpensive and will not only eectually maille asharp exhaust but does so Without causing a back pressure in thecylinder as the obstructions are .moved in the direction of the flow ofthe exhaust. Although revision will be made lfor rotating the muingcylinder such will absorb little or no power as the impact of theincoming exhaust on the projections will assist rotation.

Having now particuilarly described my invention and t manner of itsoperation l hereby declare that what l claim as new and desire to beprotected in by Letters Patent is;

l. A gas engine muitler comprising a rotatable cylinder having afplurality of rpjections on its outer sur ace arrange in rows parallelto the axis of rotation, said projectionsof each row being spaced apartfrom one another a distance equal to the le cylinder which width of aprojection, and said rows of projections being spaced one row from theother a distance equal to the length of a projection, said rows lbeingarranged in staggered relation with one another to form spaces aroundthe a casing inclosing said cylinder and its pro- 'ections, an entrantport through said casing the full width thereof and arrangedtangentially to said cylinder, said casing having an exhaust portarranged tangentially to said cylinder, the full width of the casing,substantially as shown and described.

2.V A mulier for gas engines comprisingl a rotatable cylinder having aplurality of rows e withconvenient part of the iii-- separate g atentapplication periphery of the cylinder,

of projections on its peripheral surface, said rows being arrangedparallel to the axis of rotation of the cylinder, and the projections ofone row being staggered with relation to those of the next adjacent row7a easing inclosing the cylinder and its projections, said casing havingan inlet port the full Width of the casing and having an exhaust port inclose juxtaposition to the inlet port also 10 extending the full Widthof the casing, all' being arranged substantially as shown and JOHNKELLINGTON.

Witnesses: M. SINCLAIR, ROWLAND BRI'ETAIN.

